1. Departments of Bacterial Diseases, Immunolopy, and Bacterial Inmmunology, Walter Reed Army Institute of Research, Washington, DC 20307- 5100.
2. Praxis Biologics, Rochester, NY 14623-1943.
3. Molecular Genetics, Smith Kline and French Laboratories, Swedeland, PA 19406-2799.
4. Swiss Serum and Vaccine Institute, Berne, Switzerland.